send email to a filtered selection of database entries

send email to a filtered selection of database entries

I've created a database of students. I've found it simple to filter the main list by instructor, program, age, etc and I'd like to be able to send an email to filtered selections of students.

I've read the SendMail doc and experimented with the SendMail sample app, but I don't understand Zoho Creater well enough yet to implement any filtering. 

It seems like I'll need to create a new type of form for composing the email, and add fields for the desired filtering. I'm a professional programmer, but just don't know how to approach this. Can anyone provide any direction for me?